I have used use strict and use warnings; now it's showing me this things
Global symbol "$y_date" requires explicit package name at logscript.pl line 4.
Global symbol "$y_date" requires explicit package name at logscript.pl line 6.
Global symbol "$y_date" requires explicit package name at logscript.pl line 7.
Global symbol "$y_date" requires explicit package name at logscript.pl line 8.
Global symbol "$year" requires explicit package name at logscript.pl line 9.
Global symbol "$y_date" requires explicit package name at logscript.pl line 11.
Global symbol "$y_date" requires explicit package name at logscript.pl line 12.
Global symbol "$day" requires explicit package name at logscript.pl line 14.
Global symbol "@fileco" requires explicit package name at logscript.pl line 19.
Global symbol "@grepLogs" requires explicit package name at logscript.pl line 20.
Global symbol "$day" requires explicit package name at logscript.pl line 20.
Global symbol "$year" requires explicit package name at logscript.pl line 20.
Global symbol "@fileco" requires explicit package name at logscript.pl line 20.
Global symbol "@grepLogs" requires explicit package name at logscript.pl line 22.
logscript.pl had compilation errors.